Book binding corner press



Filed Feb. 14, 1962 J. J. HACKL 3,168,429

BOOK BINDING CORNER PRESS 2 Sheets-Sheet 1 4 4/ INVENTOR. -l I 48 245' H 20 Josqzgjz J flacj 4 1 J6 "f D L v w w Feb. 2, 1965 J. J. HACKL BOOK BINDING comma PRESS 2 Sheets-Sheet 2 Filed Feb. 14, 1962 Jose g fi cl F22 United States Patent Office 3,168,429 Patented Feb. 2, 1965 3,168,429 BOOK BINDING CORNER PRESS Joseph I. Hack], 416 Higgins Road, Park Ridge, Ill. Filed Feb. 14, 1962, Ser. No. 173,303 7 Glaims. (Cl. 156492) This invention relates to a press for use in book binding operations, and more particularly for use in the formation of library corners on books being bound.

In the book binding art, a library corner is one which was designed primarily for use on library books, or books which will be exposed to rough handling and/ or frequent use. A library corner, as will be disclosed in greater detail hereinafter, is formed by folding a book cover portion upon the corner of a board, or backing sheet, so that the crease line of the fold is normal to a line bisecting the corner. The sides of the cover portion, adjacent the edges of the board, are then folded upon the board, thus forming a corner which has three layers of material in a given area on the inside of the covered board. In such manner, a very strong corner is provided, which makes a book, so bound, much better adapted for rough handling and/or frequent use, as compared with other types of book binding methods.

The apparatus of the present invention may be used for efficiently forming a library corner in a book binding operation. More particularly, the apparatus of the present invention, may be used to simultaneously prepare two corners of a cover in library corner type binding operations, thereby speeding up binding operations significantly, and producing an improved end product. The apparatus of the invention will be found to provide substantial savings in book binding operations.

The main object of this invention is to provide apparatus for use in the formation of library corners in a bookbinding operation in a more efficient manner.

A more specific object is to provide apparatus for use in the formation of library corners in bookbinding operations, which will speed up operations appreciably.

Another object is to provide substantial savings in the formation of library corners in a book binding operation.

These and further objects and features of the invention will become more apparent from the following description and accompanying drawings wherein:

FIG. 1 is a plan view of apparatus embodying the principles of the invention;

FIG. 2 is an end view of the same;

FIG. 3 is an enlarged view as seen from line 33 in FIG. 1;

FIG. 4 is an enlarged view as seen from line 44 in FIG. 1;

FIG. 5 is a fragmentary plan view of a case for a book in readiness for a library corner binding operation;

FIG. 6 is an enlarged view as seen from line 66 in FIG. 5;

FIG. 7is a View similar to that of FIG. 5, but showing a first stage in the formation of a library corner;

FIG. 8 is an enlarged view as seen from line 88 in FIG. 7;

FIG. 9 is a view similar to that of FIG. 5, but showing a final stage in the formation of a library corner; and

FIG. 10 is an enlarged view as seen from line Iii-10 in FIG. 9.

Referring now to the drawings, numeral 12 identifies a corner press incorporating the principles of the invention, which includes a rectangular base plate 14 on which are afiixed a T-shaped guide strip 16 and a guide strip 18 having a side slot, or groove 20.

Mounted for sliding movement upon the base plate 14, are a pair of elongated blocks 22, which are each arranged at a 45 angle with an edge of the guide strip 18, as best seen in FIG. 1. The blocks 22 each have a T-shaped groove 24 and a tongue 26, which slidingly engage the guide strip 16 and guide strip groove 20, respectively, whereby each block will be maintained in said angular position as they are moved upon the base plate 14. Toward this end, a screw 28 having opposite running threads on each half portion thereof, is arranged for threaded engagement with each block 22. Screw supporting blocks 30, 32, and 34, secured to the base plate 14, are arranged for the operative support of the screw 28. A hand wheel 36 at one end of the screw may be used for rotation of the screw for movement of the blocks 22 toward or away from each other.

Extending upwardly from one end of each block 22 is a post, or pillar 38, which pivotally supports a rear end of a cylinder 49. A piston 42, the rod portion of which extends from the front end of the cylinder, has a yoke, or fork 44, which is pivotally afiixed to an ear, or lug 46 secured to the back of a press plate 48. The press plate 48 is pivotally affixed to a heel plate 50, by a pin means 52, which is secured to the block 22. The longitudinal axis of the pin means 52, is normal to the center line of the block 22.

Each press plate 48, is recessed to form a pair of symmetrically arranged ledges 54, which are angularly positioned 45 from the vertical center-line of the press plate, as best seen in FIG. 4. Directly forward of each heel plate 50, the block 22 is recessed to receive a resilient pad 56, preferably of rubber, which pad has an area slightly larger than that of the press plate. It will be seen that outward movement of the piston 42, will cause the press plate 48 to rotate downwardly about the pivot pin 52 in a arc and into engagement with the pad 56.

A pair of T-pipe fittings 58 and 60 are positioned for directing pressurized fluid, such as compressed air, to alternate ends of the cylinders 40. The pipe fittings 58 and 60 are served by a valve means 62, which in normally off position, supplies compressed air to the front end of each cylinder 40 to keep the piston rods in retracted position, as shown in FIG. 1. By depressing a control lever 64 of the valve means 62, compressed air is fed to the rear end of each cylinder 40, to move the piston rod outwardly therefrom.

The operation of the device is quite simple. A case, of book back 66, to be worked upon in the press assemblage 12, includes a pair of boards 68, which may be formed of cardboard, or other suitable material, secured, as by glueing, to a cover 70, formed of paper, cloth, leather, or other flexible material, which is larger than the boards, thus providing a uniform edge portion 72. The case 66 is positioned so that two corners of a board 68 will be placed at the center of the press plates 48, with the corners of the cover material 70 extending upwardly adjacent the face of a press plate, all as best seen in FIG. 1.

The rods of pistons 42 are then operated to move out of the cylinders 40, causing the press plates 48 to swing downwardly 90, resulting in the folding of each corner of the cover 70, into engagement with the corner of a board 68, as best seen in FIG. 7. A fold line 73 thus formed is normal to a line bisecting the corner of the board 68. It is to be noted, as seen in FIG. 8, that triangular portions of the folded cover material, not in contact with the board 68, are pressed into engagement with edge portions 72, by virtue of the recessed face of the press plate 48. Such an operation results in the formation of a tight and neat binding, as will be appreciated. Prior to such folding operations, glueing material may be applied to the edge portion 72, whereby the folded material will be held in folded condition.

After folding of two corners are thus simultaneously completed, the pistons 42 are operated in reverse direction, thereby swinging the press plates 48 to non-operative, or initial position. The book case is then rotated so that the remaining two corners may be folded. When all four corners are completed in the same manner, the book case is placed in a press (not shown) whereby the edge portions 72 are folded over upon the boards 68. In so doing, the corner portions will have a triple thickness of cover material, as shown in FIGS. 9 and 10, which constitutes a library corner, as used in book-binding oper-ations.

It will be seen, that by rotating the screw 28, the press plates 48 may be set to accommodate whatever size book case vis to be operated upon, care being taken to see that the center of each press plate coincides with an adjacent corner of the board being worked upon. For purpose of convenience, a mark 74 may be inscribed on a block 22 for alignment with a series of graduations, or indicia, 76 placed on the edge of the guide strip 18, which graduations are designed to indicate the distance between the vertical center lines of the press plates 48. With such an aid, the blocks 22 may be quickly moved and placed, as.

required for a given book case corner folding operation.

It will be seen that .a press made in accordance with the above disclosure will satisfy the objectives set forth hereinbefore.

The foregoing description has been given in detail without thought of limitation since the inventive principles involved are capable of assuming other forms without departing from the spirit of the invention or the scope of the following claims.

What is claimed is:

1. Apparatus for folding the corners of a cover upon a book board in preparation for the formation of a library corner comprising, a base plate, and a pair of cover folding means in spaced relation upon the base plate and in-' corner comprising, a base plate, a pair of cover folding means upon the base plate and including means tosimul- .taneously fold two portions of the cover .upon the book board so that the fold line of each portion is normal to .a line .bisecting the respective corner of the book board, and means to adjust the distance between said cover folding means.

3. Apparatus for folding the corners of a cover upon a book board in preparation for the formation of a library corner comprising, a base plate, a pair of cover folding means upon the base plate each including a press plate which is pivoted about one end for simultaneously folding two portions of the cover upon the book board so that the fold line of each portion is normal to a line bisecting the respective corner of the book board, and means to adjust the distance between said cover folding means.

4. Apparatus for folding the corners of a cover upon a book board in preparation for the formation of a library corner comprising, a base plate, a pair of cover folding means upon the base plate each including a press plate which is pivoted about one end for simultaneously folding two portions of the cover upon the book board so that the fold line of each portion is normal .to a line -bisecting the respective corner of the book board, said cover folding means each including a power operated means for pivoting the press plate, andascrew means for adjusting the distance between the cover folding means.

5. Apparatus for folding the corners of a cover upon a book board in preparation for the formation of a library corner comprising, a rectangular base plate, a pair of cover folding means movably mounted upon the base plate each including a press plate the'face of which is at a 45 angle relative to an edge of the base plate, said cover folding means each including a power operated means for pivoting the press plate about its base in an arc of 90,

each of said press plates having .a recessed surface providing ledges which are at a 45 angle relative the vertical center line of the plate, and a screw means for adjusting the distance between the cover folding means.

6. Apparatus for folding the corners of a cover upon a book board, a rectangular base plate, a pair of blocks each having a cover folding means including a press plate the face of which is at a 45 angle relative to an edge of the base plate, said blocks being movably mounted on the base plate, said cover folding means each including a cylinder and piston means for pivoting the press plate about its base in an arc of each of said press plates having a recessed surface providing ledges which are at a 45 angle relative to the vertical center line of the plate, a screw means for adjusting the distance between the cover folding means, and a resilient pad means mounted on each block in front of the press plate and engageable by the press plate.

7. Apparatus according to claim 6, wherein a valve means is arranged for the simultaneous admission of pressurized fluid to either end of the cylinders.

References Cited in the tile of this patent UNITED STATES PATENTS 1,977,908 Glass Oct. 23, 1934 2,621,142 Wetherell Dec. 9, 1952 2,937,689 Peterson May 24, 1960 

5. APPARATUS FOR FOLDING THE CORNERS OF A COVER UPON A BOOK BOARD IN PREPARATION FOR THE FORMATION OF A LIBRARY CORNER COMPRISING, A RECTANGULAR BASE PLATE, A PAIR OF COVER FOLDING MEANS MOVABLE MOUNTED UPON THE BASE PLATE EACH INCLUDING A PRESS PLATE THE FACE OF WHICH IS AT A 45* ANGLE RELATIVE TO AN EDGE OF THE BASE PLATE, SAID COVER FOLDING MEANS EACH INCLUDING A POWER OPERATED MEANS FOR PIVOTING THE PRESS PLATE ABOUT ITS BASE IN AN ARC OF 90*, EACH OF SAID PRESS PLATES HAVING A RECESSED SURFACE PROVIDING LEDGES WHICH ARE AT A 45* ANGLE RELATIVE THE VERTICAL CENTER LINE OF THE PLATE, AND A SCREW MEANS FOR ADJUSTING THE DISTANCE BETWEEN THE COVER FOLDING MEANS. 